Root-beveling device.



W. C. DALBEY.

ROOT BEVELING DEVICE.

APPLICATION FILED IAN-18.1913.

Patented Oct. 26, 1915.

Wifiz 6 51 74 2:? AMM pnirnn snares rairnnr WILLIAM C. DALBEY, OF IDUQUOIN, ILLINOIS, ASSIGNOR TO THE CLEVELAND DENTAL MANUFACTURING COMPANY, OF CLEVELAND, OHIO, A CORPORATION OF OHIO.

ROOT-BEVELING DEVICE.

Patented Oct. 26, 1915.

Application filed January 18, 1913. Serial No. 742,809.

To all whom it may concern:

Be it known that I, WILLIAM C. DALnnY, a citizen of the United States, residing at Duquoin, in the county of Perry and State of Illinois, have invented a certain new and useful Improvement in Root-Beveling Devices, of which th following is av full clear, and exact description.

This invention relates to a root beveling device which is adapted to be attached to the hand piece of an ordinary dental engine for the purpose of beveling the margin of a root preparatory to applying thereto a so- :alled swaged cap or banded crown.

The object of thein'vention is the pro vision of a device by which a root may be beveled easily, quickly and uniformly eutirely about its margin without mutilating the gum. V

The invention may be briefly summarized as consisting in certain novel details of construction and combinations and arrangements of parts which will be described in the specifications and set forth in the ap-.

pended claims.

In the drawings wherein I have shown am embodiment of my invention which answers the requirements with high eiiiciency,

Figure 1 is an elevation of the device at-. tached t the hand piece of a dental engine showing the manner in which it is used in beveling the margin of a root; Fig. 2 is a sectional view substantially along the line 22 of Fig. 1; Fig. 3 is a detached view of the pivotal pin about the axis of which the bar or beveling tool is revolved.

Referring now to the drawings, it will. be seen that my invention is in the nature of an attachment to an ordinary hand piece of a dental. engine. The attachment includes a sleeve-like member 11 which is adapted to be slipped onto the hand piece and to be held from rotation thereon by any suitable locking means which inthis case includes a pin 10 of the hand piece and a slot 11 of the sleeve,which slot receives the pin. as shown in Fig. 2. Attached to the sleeve, or to a strip or metal piece alongside the sleeve, preferably by one or more screws 12, is a rather stifli' flat spring 13*which extends upwardly alongside of the sleeve, and

beyond the end thereof, as shown. Secured in any suitable manner to the upper or free end of the spring 13 is a device 14 which may be termed a head. This head is pro vided with a lateral projection 1% having an elongated slot Li through which is adapted to-project freely the shank of a bur 15 for beveling the margin of the root. This bur will be rotated through the me dium of the flexible shaftxof a dental en gine in the usual manner, and its shank will have any suitable form of driving connectionwith the driving or rotating part in the hand piece. As this forms no part of the present invention, I have not illustrated details of the driving connection, or any of the details of the hand piece. The head 14: additionally hasan opening or passageway which extends substantially at right angles to the projection 14" and in this opening is adapted to be secured a pivoting pin 16. This pin 16 has at its upper end a reduced portion 1G which is adapted to extend into the canal of the root which is shown at 17 and below the reduced portion 16, the pin 16 is provided with a shoulder 16 which when the device is in use, is adapted to bear against the end of the root as shown in Fig. 1. The pin 16 is preferably secured on the head 14: by means of a set screw 18, which enables the pin to be adjusted in its position in the head, either lengthwise or circumferentially. Preferably, the lower end of the pin 16 is beveled as shown at 16, the beveled end extending downward in proximity to the upper conical or tapered end of the hand piece 10.

In the use of the device so far described,

the parts are assembled on the hand piece as shown, with the shank of the bur extending freely through the slot lat". Thence to bevel the margin'or edge of the root, the reduced end of the pin is inserted in the canal of the root, and thence the beveling bur is rotated in'the usual manner by the power of the dental engine, and at the same time the hand piece is turned about the pin as an axis; The spring 13 which connects the pin with the sleeve. being vielda'ble or elastic, presses the bur against the margin of the tooth and allows it to follow or conform to the irregularities of the margin of the tooth, the bur then moving inwardly toward or outwardly away from the pivoting pin, but at all times being held against the margin of the root. VVhen the bur is thus revolved a few times about the root, the margin of the latter will be uniformly beveled throughout its entire periphery or perimeter.

The relative inward and outward movethe bur toward the pin 16? is limited by the engagement of the lower end of the pin with the tapered upper end of the hand piece,

By turning the pin 16 .so that different points of the'beveled end16 may contact with the end of the hand piece, thedistance that the beveling bur can be held from the pin can be accurately and very nicelv adpjusted. The practical advantages of this v 20 feature lie in the fact that I am thus enabled 7 tovary the width or amount of the bevel and also to provide a limiting stop against the inward movement of the-bur toward the pin so as to prevent the bur movinginward sufiiciently to engagethe enlargement or shoulder '16". I prefer also to provide 'meansfor adjusting the effective tension of the spring 13 so as to vary the pressure of the bur against the marginjof the tooth. This is accomplished in a simple and effec- V tivemanner by means ofa short screw 19 which is carried by the sleeve and extends loosely through the spring 13 a suitable distance from its lower end. As the screw is moved inward, the spring is made stiffer, for its effective length is then decreased, and as the screw is moved outward, the stifi'- ness is decreased.

It'will be obvious that the attachment above described can be cuicklv applied tothe hand piece of a dental engine. and that 1n a verv short space of time the root can be be eled to inst exactly the'e xtent required,

and with uniformitv at all points, regardless of the shape of the margin of or its regularitv or irregularity.- Furthermore, the beveling can be accom lished without. mutilating the gum and without 1 Copies of this patent may be obtained for material discomfort to the atient.

I do not desire to be confined to the exact details shown, but aim in mv claims to co er all modifications which do not involve a departnre' from the spirit and scope of my inventlon.

7 Having thus described my invention, what I claim is: V

.1. The combination with the hand-piece of a dental engine having a cutting tool. of a root beveling attachment comprising a .pivot adapted tobe inserted in the canal of the root,

a root, said pivot extending alongside the cutting tool and being detachablv connected to and yleldingly supported from the handpiece.

2. The combination with the hand-piece of adental engine having a cutting tool, of a root beveling attachment comprising, a device detachably connected to the hand-piece, a pivot member adapted to be inserted in the canal of a root, and a spring carrying said pivot member and attached to said device.

3. A root bevcling attachment for the hand piece of a dental engine comprising a device adapted to be attached to the hand piece, a pivot adapted to be inserted in the canal of a root and having a vieldable support connected to said device, said support having a laterally proiecting member provided with a slot adapted to accommodate the shank of a beveling tool.

4. A root beveling attachment for the hand piece of a dental engine comprising a sleeve adapted to be placed on the hand piece. a leaf spring connected to said sleeve and extending alongside and beyond the same, said spring having at its outer free end a member carrving a pivot pin adapted to be inserted in the canal of a root, said member having a lateral proiccting portion provided with an elongated slot adapted to receive the shank of a beveling tool.

5. A root beveling attachment for the hand piece of a dental en ine comprising a device adapted to be attached to the hand piece, a vieldable support extending alongside said device and connected at one end thereto, a pivot pin carried at the opposite end of said support and adiustable relative thereto both circumferentiallv and longitudinallv, said pin having at its outer end a portion adapted to be inserted in the canal of the rcot, and its inner end being beveled for the purpose set forth.

6. The combination with a root grinder having a hand piece and a grinding tool projecting beyond the end the eof, a pivot extending alon side the grinding member and adapted to be inserted in the canal of a root. a member detachablvc nnected to the hand iece. and means connecting said pivot to said member, said means permitting relative lateral movement between the pivot and the grinding tool.

In testimony whereof, I hereunto ailix my signature in the resence of t o wi nesses.

WILLIAM C. DALBEY.

Witnesses:

H. WoR'rHINGToN, JosnPH DUNN.

five cents each. by addressing the Commissioner of Yatents.

Washington, D. G. 

